Flexible spring-coupling.



C. ULVEN'.

FLEXIBLE-SPRING COUPLING. APPLICATIONA FILED Aum. 1914.

1,220,295 Patented Mar. 27, 1917.

TH: Nonni: PETERS co., wAsHINawN, n. c.

UNITED sTATEs PATENT oEEIcE.

CHRISTIAN ULVEN, OF ST. PAUL, MINNESOTA, ASSIGNOR TO MINNEAPOLIS IRON STORE COMPANY, OF MINNEAPOLIS, MINNESOTA, A CORPORATION.

FLEXIBLE SPRING-COUPLIN G.

Specification of Letters Patent.

Patented Mar. 27, 1917.

To all 'whom t may concern.'

Be it known that I, CHRISTIAN ULVEN, citizen of the United States, resident of St. Paul, Ramsey county, Minnesota, have invented certain new and useful Improvements in Flexible Spring-Couplings, of which the following is a specification.

The object of my invention is to provide an improved coupling adapted for use with a full or three-quarter elliptic spring or a 'scroll elliptic spring, or a half elliptic, for

the purpose of taking up the shock or jar resulting from the passage of the vehicle over a rough or uneven street or road.

A further object is to provide a coupling of simple construction and one which can be readily applied to a standard spring.

Other objects of the invention will 'appear from the following detailed description.

The invention consists generally in various constructions and combinations, all as hereinafter described and particularly pointed out in the claim.

In the accompanying drawings forming part of this specication,

Figure 1 is a side view of a full elliptic spring of the single scroll type, with my invention applied thereto,

Fig. 2 is a plan view of Fig. 1.

In the drawing, 2 represents the upper section and 3 the lower section of a full elliptic spring, the leaves being pivotally connected at A to one another at one end of the spring. At the other end of the section 2 is a scroll 5 supporting a pin 6, while a similar pin 7 is mounted in the adjacent end of the spring section 3. These pins extend outwardly on each side of the spring leaves and may be in the form of bolts, with a head at one end and lock nuts at the opposite end or each end of the pins may be threaded to receive suitable nuts. This, however, is a detail of the device and I do not conne myself to any special form of pin or bolt.

8 represents a pair of spring steel loops, substantially circular in form, each loop having its ends mounted respectively on the outwardly projecting ends of the pins 6 and 7, the end of the loop connected to the spring 7 lapping by the opposite end of the loop and normally assuming a position substantially as shown in Fig. 1. rIhe loops are of any suitable size, and the gage of the metal may be varied according to the character of the vehicle on which they are used, and the load to be carried. These loops take the place of the ordinary inflexible coupling between the sections of the spring and are suiiicently resilient to yield under the load and have a cushioning eect to take up the shock or jar resulting from the passage of the vehicle over rough or uneven places in the street or road. Furthermore, these flexible loops lessen the danger of breaking the spring when subjected to a heavy strain.

The invention maybe applied to one or both ends of the spring, as desired, or to a full or half elliptic. The function, however, of the loops is substantially the same in both cases, the only difference being in the adaptation of the device to different forms of springs.

The coupling can be used on vehicle springs of all kinds and is particularly adapted for automobiles to relieve the occupants of the car of the shock or jar resulting from riding over rough roads.

In various ways the details of construction herein shown and described may be modified and still be within the scope of my invention.

I cla-im as my invention:

The combination, with a full elliptic spring having its upper and lower sections hinged together at one end, the opposite end ofthe upper section being downwardly and inwardly curved to a point beneath and adjacent to the corresponding end of the lower section, a pair' of spring steel loops disposed upon opposite'sides of said my hand this 5th day of August, 1914.

CHRISTIAN ULVEN. Witnesses:

EDWARD A. PAUL, GENEVIEVE E. SoRENsEN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

